681. Practice check: In basic biology, what is the largest organ of the human body?
✅ A. Skin
a: Skin | b: Liver | c: Brain | d: Lung Read more
Biology MCQs – Page 35
682. Practice check: In basic biology, which part of the eye controls the amount of light entering?
✅ C. Iris
a: Optic nerve | b: Retina | c: Iris | d: Cornea only Read more
683. Practice check: In basic biology, which structure controls what enters and leaves a cell?
✅ A. Cell membrane
a: Cell membrane | b: Nucleolus | c: Chromosome | d: Cell wall only Read more
684. Practice check: In basic biology, which molecule is the main immediate energy currency of cells?
✅ D. ATP
a: Starch | b: RNA | c: DNA | d: ATP Read more
685. Practice check: In basic biology, which organisms make their own food using sunlight in most ecosystems?
✅ A. Producers
a: Producers | b: Decomposers only | c: Primary consumers | d: Predators Read more
686. Practice check: In basic biology, what is the study of fungi called?
✅ C. Mycology
a: Ornithology | b: Ecology | c: Mycology | d: Entomology Read more
687. Practice check: In basic biology, what is the study of insects called?
✅ B. Entomology
a: Mycology | b: Entomology | c: Herpetology | d: Botany Read more
688. Practice check: In basic biology, which part of the brain helps coordinate balance and movement?
✅ B. Cerebellum
a: Medulla only | b: Cerebellum | c: Hypothalamus | d: Pituitary gland Read more
689. Practice check: In basic biology, which organ produces insulin?
✅ D. Pancreas
a: Thyroid | b: Spleen | c: Gallbladder | d: Pancreas Read more
690. Practice check: In basic biology, which vitamin is essential for normal blood clotting?
✅ B. Vitamin K
a: Vitamin D | b: Vitamin K | c: Vitamin C | d: Vitamin B1 Read more
691. Practice check: In basic biology, which biological process produces two genetically similar daughter cells for growth?
✅ A. Mitosis
a: Mitosis | b: Fertilization | c: Transcription | d: Meiosis Read more
692. Practice check: In basic biology, which cells help defend the body against infection?
✅ A. White blood cells
a: White blood cells | b: Red blood cells | c: Adipocytes | d: Platelets Read more
693. Practice check: In basic biology, which organ is primarily responsible for gas exchange in humans?
✅ C. Lungs
a: Heart | b: Spleen | c: Lungs | d: Gallbladder Read more
694. Practice check: In basic biology, which part of a plant absorbs most water from soil?
✅ B. Roots
a: Leaves only | b: Roots | c: Flowers | d: Fruits Read more
695. Practice check: In basic biology, which pigment gives many plants their green colour?
✅ A. Chlorophyll
a: Chlorophyll | b: Haemoglobin | c: Keratin | d: Melanin Read more
696. Practice check: In basic biology, which organ filters blood to produce urine?
✅ C. Kidney
a: Lung | b: Stomach | c: Kidney | d: Pancreas Read more
697. Practice check: In basic biology, which blood type is commonly called the universal red-cell donor in emergency contexts?
✅ A. O negative
a: O negative | b: B negative | c: AB positive | d: A positive Read more
698. Practice check: In basic biology, which molecule carries hereditary information in most organisms?
✅ A. DNA
a: DNA | b: ATP | c: Glucose | d: Cellulose Read more
699. Practice check: In basic biology, what is the basic structural and functional unit of life?
✅ C. Cell
a: Organ | b: Tissue | c: Cell | d: Organ system Read more
700. Practice check: In basic biology, which organelle is often called the powerhouse of the cell?
✅ C. Mitochondrion
a: Lysosome | b: Ribosome | c: Mitochondrion | d: Golgi apparatus Read more